Piston-ring-hammering machine



W. A; OUBRIDGB PISTON RING HAMMERING MACHINE.

APPLICATION FILED NOV-20,1918;

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PISTON RING HAMMERING MACHINE.

APPLICATION FILED NOV- 20, -I9I8- j q Panzemea Apr. 6 192%;

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W. A. OUI1RIDGE.

PISTON RING HAMM ERING MACHINE.

APPLICATION FILED NOV. 20,1918.

msmss WILLIAM ARTHUR OUBRIDGE, OF COVENTRY, ENGLAND Specification of Letters Patent.

PISTON-RING-HAMMERING MACHINE.

Patented Apr. 6, 1920.

Application filed November 2.0, 1918. SerialNo. 263,263.

To all whom it may concern Be it known that 1, WILLIAM ARrHUR .OUBRIDGE, a'subject of the King of Great- Britain and Ireland, and residing at .Haldon, Park Road, Coventry, in the county of Warwick, England, have invented Im-- provements in Piston-Ring-Hammering Machines, and of which the following is a specification.

This invention relates to improvements 1n piston-ring-hammering machines in which blows of a force that varies in intensity from the slit to the center and vice versa on the inner side of thering or rings are imparted by a chisel-like tool or tools.

According to this invention, the blows of .varying force are delivered by a chisel-like tool fixed to a hammer head adapted to slide on a guide-and the force imparted to the hammer-head is varied by loading the hammer-helve, which is pivoted to the said head and is also pivoted at the opposite end, at varying points between the head and the tail of the helve.

An automatically driven means moves the load along the hammer-helve for varying the intensity of the blows of the chisel-like tool, from the minimum to the maximum and'vice versa, and means may be further provided for adjustment of the range of the movements of the' load relatively to the movement of the rings.

In addition to the load position varying means, a member 'moving synchronously therewith may cause the disengagement of the driving-clutch or the like to stop the operation of the machine whena series of blows has been completed.

In order that my invention may be properly understood the following is a description of one embodiment thereof having reference to the accompanying drawings, in which- Figure 1 is a front View of the machine selected as example.

Fig. 2 is a plan, partly in section, of the machine shown in Fig. 1.

Fig. 3 is a transverse vertical section on the line 33 Fig. 1, and

Fig. 4: is a front view of the chuck holding piston rings.

In this embodiment of the invention the sliding hammer-head 1, carrying the chiselfor - like tool l is caused to rebound just clear of its Work after a blow, by means of a spring 2 and is lifted to a uniform height to import each blow by a snail-cam 3 which engages a wiper t'fixed to the head 1 for this purpose.

The hammer-helve 5 is pivoted at 6, carried by a standard 6 on the machine frame and has a slot 7 adapted to allow the lengthwise movement necessitated by the straight line motion of the hammer-head 1 to which also it is pivoted at 8.

The varying leverage of the load, moved along the hammer-helve 5, is effected by means of a heart-cam 9 formed to correspond with the intensity of blows required at the different parts of a ring. This cam 9 reciprocates a bar 10 which bar carries a guide 11 arranged transversely thereon and in which guide slides a roller bearing 12 through which the hammer-helve 5 passes and which is constantly pulled in the direction to press on the said helve 5 and force the hammer-head toward its work, the pulling'being effected by a helical spring 18 fixed at one end to a lug 1 1 carried on the guide v11 and at the other end to a hook 12 fixed to the roller bearing 12. To allow the loading to be varied an anti-friction barroller 15 is carried by the bar 10 and is adjustable transversely thereof along a crossbar 16 for graduating the relative force of all the blows in a series of blows, and the' heart-cam 9 transmits a reciprocal movement to the said anti-friction bar-roller 15 and consequently to the bar 10 which carries it, by means of a lever 17 which it oscillates through a lever-roller 18 mounted thereon.

By adjusting the bar-roller 15 along the lever 17 and setting it on the cross-bar by tightening the nuts 16 and thereby causing the screws to force the slide 16 and V-strip 16 against the cross-bar 16 to grip it, the

travel of the bar may be increased or,

maximum, and vice-versa, has been delivered, allows a clutch lever-roller 24 to drop into a notch 25in the said cam 23 andso release the driving clutch 26 'and stop operation of the machine.

The machine is driven by means of-a loose pulley 27 which rotates its shaft 28 when a friction disk 29, feathered on the said shaft 28, is operated, which shaft 28 has worms 30 and 31 in gear with worm-wheels 33 and 34. Theformer rotates on the fixed pin 22 and has the heart-cam 9 and clutch-cam 23 fixed to it. The latter worm-wheel 34 is integral with the ring chuck 50, and this worm-shaft 28 drives, through toothed wheels 35 and 36, a second shaft 37 for operatingthe snailcam 3 which raises the hammer-head 1.

Thepiston-ring chuck 50 (see Figs. 3 and 4) preferably comprises a removable bedring 38 fixed in the chuck 50 and recessed annularly to receive the piston-ring or rings, for example'such as that indicated at 39, to be operated upon and a cover-ring 40 adapted to be pressed against the pistonring, when the latter is'in place, by handled nuts 41, 41 engaging studs 42, 42 fixed to the chuck. In Fig. 3 a stud and nut are displaced to show the construction. These nuts engage the outer side of the cover-ring 40 near its outer periphery and are used to force the covering 40 and bed-ring 38 one toward the other for gripping the pi'stonring or rings between them. The nuts 41, 41

are provided with handles or knobs 41, 41-

for easy manipulation and the cover-ring 40 is recessed at 43, 43 and furnished with a spider-handle 44 so that by rotating it until the said recesses 43, 43 register with the nuts 41, 41 it may be easily inserted or re- "moved.

I claim 1. A piston ring hammering machine comprising in combination, a hammer-head, a hammer-helve connected thereto at one end and pivoted to a relatively stationary part of the machine at its other end, means for holding a piston-ring in position for being hammered by said hannner-head, a loading means for said hammer-helve, means for varying the position of -said loading means along said hammer-helve and means for reciprocating said haimner-head substantially as described.

2. A piston ring hammering machine comprising in combination, a hammer-head, a hannner-helve connected therctd at one end andpivoted to a relatively stationary part 7 of the machine at itsother end, means for holding a piston-ring in position for being hammered by said hammer-head, a loading means for said hammer-helve, means for varying the position of said loading means along said hammer-helve and means for reciprocating said hammer-head and mechanism actuated together with the hammering 'stantially as described.

machine for automatically moving said loading means along the hammer-helve, substantially as described.

3. A piston ring hammering machine com- I prising in combination, a hammer-head,

' helve and a heart cam adapted to move said loading device along said hammer-helve and actuated mechanically together with the hammering machine, substantially as described. p

4. A piston ring hammering machine comprising in combination, a hammer-head, a hammer-helve connected thereto at one end and pivoted to a relatively stationary part of the machine at its other end, means for holding a piston-ring in position for being hammered by said hammer head, and means for reciprocating said hammer-head, a loading means for said hammer-helve, a guide for said loading device disposed approximately transversely of said helve, a bar carrying the said transverse guide and movable at right angles thereto, a member on the bar for transmitting pressure thereto, a cam for imparting movement to said bar through said member, means for operating said cam and means for varying the length of movement imparted to said member, substantially as described.

'5. A. piston-ring hammering machine comprising in combination, a hammer-head, a hammer-helve connected thereto at one end and pivotedto a relatively stationary part of the machine at its other end, means for holding a piston ring in position for being hammered by said hammer-head, a loading means for said hammer-helve, means for varying the position of said loading means along said hammer-helve and means for reciprocating said hammer-head, a guide for said loading device disposed approximately transversely of said hammerhelve, a bar carrying the said transverse guide and movable at right angles thereto, a bar-roller on said bar for transmitting pres- .sure thereto from a 'cam working-surface and adjustable transversely of said bar, a bar-lever adapted to oscillate in contact with the tread of said bar-roller and a roller on the bar-lever adapted to make peripheral contact with said cam working-surface, sub- 6. A piston ring hammering machine comprising in combination, a hammer-head, a hammer-helve connected thereto at one end and pivoted to a relatively stationary part of the machine at its other end, a chuck for holding a piston-ring in position for being hammered by said hammer-head and comprising a chuck body, a bed-ring recessed annular-1y to receive a piston-ring, means for progressively rotating said bedring, a detachable cover-ring adapted to lie against the piston-ring in theybed-ring, a screw separate from the cover-ring and fixed to said bed-ring, a nut engaging said screw for applying pressure to and grip ping said piston-ring between said bed-ring and said cover-ring and adapted to allow the detachment and removal of said coverring and piston-ring past said screw and nut when the pressure is relieved, a loading means for said hammer-helve, means for varying the position of said loading means along said hammer helve and means for reciprocating said hammerhead, substantially as described.

7. A piston ring hammering machine comprising in combination, a hammer-head adapted to move in a straight line, a snailcam and gearing operated together with the machine for reciprocating said hammerhead, a hannnerhelve connected thereto at one end and pivoted to a stationary part of the machine at its other end, achuck for holding a piston ring in position for being hammered by said hammer-head and comprising a chuck body, a bed-ring recessed annularly to receive a piston ring, a detachable cover-ring adapted to lie against the piston ring in the bed-ring, a screw se cured to said bed-ring at each of opposite ends of a diameter thereof, a nut engaging each screw for applying pressure to said cov'er-ring so as to grip the piston-ring between said bed-ring and said cover-ring and so as to allow the detachment and removal of said cover-ring and piston-ring past the screws and nuts when said pressure is relie"ed,toothed gearing for automatically and progressively rotating said bed-ring, a loading device fol-said hamnier-helve, a guide for said loading device disposed transversely of said hammer-helve, a bar carrying the transverse guide and movable at right angles thereto a bar roller on said bar and adjustable transversely thereof, a bar-lever in contact with the tread of said bar-roller, a heart-cam, a bar-lever roller on said bar-lever adapted to make peripheral contact with said heart-cam Working-surface and means for automatically arresting the operation of the machine, substantially as described.

WILLIAM ARTHUR OUBR-IDGE. 

